java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/psyco/psyco_io_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:56:38,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:56:38,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:56:38,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:56:38,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 23:56:38,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 23:56:38,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 23:56:38,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 23:56:38,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 23:56:38,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 23:56:38,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 23:56:38,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 23:56:38,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 23:56:38,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 23:56:38,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 23:56:38,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 23:56:38,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 23:56:38,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:56:38,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:56:38,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:56:38,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:56:38,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:56:38,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:56:38,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:56:38,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:56:38,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:56:38,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:56:38,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:56:38,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 23:56:38,515 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:56:38,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:56:38,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:56:38,516 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:56:38,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:56:38,517 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:56:38,517 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:56:38,517 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:56:38,517 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:56:38,517 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:56:38,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:56:38,518 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:56:38,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:56:38,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:56:38,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:56:38,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:56:38,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:56:38,520 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:56:38,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:56:38,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:56:38,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:56:38,520 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:56:38,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:56:38,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:56:38,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:56:38,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:56:38,521 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:56:38,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:56:38,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:56:38,522 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:56:38,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:56:38,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:56:38,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:56:38,583 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:56:38,583 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:56:38,584 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_io_1.c [2019-09-09 23:56:38,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d638bdb/defff35f50ef4f43b7d86f4e1506803a/FLAG3e9a5f127 [2019-09-09 23:56:39,099 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:56:39,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_io_1.c [2019-09-09 23:56:39,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d638bdb/defff35f50ef4f43b7d86f4e1506803a/FLAG3e9a5f127 [2019-09-09 23:56:39,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56d638bdb/defff35f50ef4f43b7d86f4e1506803a [2019-09-09 23:56:39,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:56:39,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:56:39,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:56:39,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:56:39,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:56:39,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b80efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39, skipping insertion in model container [2019-09-09 23:56:39,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,492 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:56:39,520 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:56:39,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:56:39,755 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:56:39,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:56:39,936 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:56:39,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39 WrapperNode [2019-09-09 23:56:39,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:56:39,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:56:39,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:56:39,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:56:39,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... [2019-09-09 23:56:39,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:56:39,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:56:39,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:56:39,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:56:39,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:56:40,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:56:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:56:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:56:40,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:56:40,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:56:40,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:56:40,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:56:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:56:40,475 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:56:40,475 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-09 23:56:40,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:56:40 BoogieIcfgContainer [2019-09-09 23:56:40,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:56:40,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:56:40,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:56:40,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:56:40,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:56:39" (1/3) ... [2019-09-09 23:56:40,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5731e791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:56:40, skipping insertion in model container [2019-09-09 23:56:40,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:56:39" (2/3) ... [2019-09-09 23:56:40,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5731e791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:56:40, skipping insertion in model container [2019-09-09 23:56:40,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:56:40" (3/3) ... [2019-09-09 23:56:40,484 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_io_1.c [2019-09-09 23:56:40,498 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:56:40,509 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:56:40,526 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:56:40,551 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:56:40,551 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:56:40,551 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:56:40,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:56:40,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:56:40,552 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:56:40,552 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:56:40,552 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:56:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2019-09-09 23:56:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-09 23:56:40,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:56:40,580 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:56:40,582 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:56:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:56:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1344510601, now seen corresponding path program 1 times [2019-09-09 23:56:40,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:56:40,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:40,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:56:40,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:40,628 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:56:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:56:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:56:40,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:56:40,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-09 23:56:40,707 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:56:40,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-09 23:56:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-09 23:56:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 23:56:40,726 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 2 states. [2019-09-09 23:56:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:56:40,746 INFO L93 Difference]: Finished difference Result 69 states and 105 transitions. [2019-09-09 23:56:40,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-09 23:56:40,747 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-09 23:56:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:56:40,757 INFO L225 Difference]: With dead ends: 69 [2019-09-09 23:56:40,757 INFO L226 Difference]: Without dead ends: 61 [2019-09-09 23:56:40,758 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 23:56:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-09 23:56:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-09 23:56:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-09 23:56:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 91 transitions. [2019-09-09 23:56:40,796 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 91 transitions. Word has length 12 [2019-09-09 23:56:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:56:40,796 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 91 transitions. [2019-09-09 23:56:40,797 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-09 23:56:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 91 transitions. [2019-09-09 23:56:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-09 23:56:40,798 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:56:40,798 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:56:40,798 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:56:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:56:40,799 INFO L82 PathProgramCache]: Analyzing trace with hash -737350840, now seen corresponding path program 1 times [2019-09-09 23:56:40,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:56:40,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:40,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:56:40,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:40,801 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:56:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:56:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:56:40,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:56:40,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:56:40,860 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:56:40,862 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:56:40,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:56:40,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:40,863 INFO L87 Difference]: Start difference. First operand 61 states and 91 transitions. Second operand 3 states. [2019-09-09 23:56:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:56:40,938 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2019-09-09 23:56:40,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:56:40,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-09 23:56:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:56:40,940 INFO L225 Difference]: With dead ends: 64 [2019-09-09 23:56:40,940 INFO L226 Difference]: Without dead ends: 64 [2019-09-09 23:56:40,941 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-09 23:56:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-09 23:56:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-09 23:56:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 94 transitions. [2019-09-09 23:56:40,950 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 94 transitions. Word has length 13 [2019-09-09 23:56:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:56:40,951 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 94 transitions. [2019-09-09 23:56:40,951 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:56:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 94 transitions. [2019-09-09 23:56:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-09 23:56:40,953 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:56:40,953 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:56:40,953 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:56:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:56:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2083915964, now seen corresponding path program 1 times [2019-09-09 23:56:40,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:56:40,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:40,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:56:40,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:40,958 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:56:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:56:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:56:41,016 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:56:41,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:56:41,016 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:56:41,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:56:41,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:56:41,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,017 INFO L87 Difference]: Start difference. First operand 64 states and 94 transitions. Second operand 3 states. [2019-09-09 23:56:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:56:41,068 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2019-09-09 23:56:41,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:56:41,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-09-09 23:56:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:56:41,070 INFO L225 Difference]: With dead ends: 56 [2019-09-09 23:56:41,070 INFO L226 Difference]: Without dead ends: 56 [2019-09-09 23:56:41,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-09 23:56:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-09 23:56:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-09 23:56:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2019-09-09 23:56:41,078 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 18 [2019-09-09 23:56:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:56:41,078 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 80 transitions. [2019-09-09 23:56:41,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:56:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 80 transitions. [2019-09-09 23:56:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-09 23:56:41,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:56:41,080 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:56:41,081 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:56:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:56:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1308188517, now seen corresponding path program 1 times [2019-09-09 23:56:41,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:56:41,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:56:41,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,083 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:56:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:56:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:56:41,136 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:56:41,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:56:41,137 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:56:41,137 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:56:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:56:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,138 INFO L87 Difference]: Start difference. First operand 56 states and 80 transitions. Second operand 3 states. [2019-09-09 23:56:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:56:41,263 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2019-09-09 23:56:41,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:56:41,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-09-09 23:56:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:56:41,266 INFO L225 Difference]: With dead ends: 96 [2019-09-09 23:56:41,267 INFO L226 Difference]: Without dead ends: 94 [2019-09-09 23:56:41,267 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-09 23:56:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2019-09-09 23:56:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-09 23:56:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 132 transitions. [2019-09-09 23:56:41,282 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 132 transitions. Word has length 23 [2019-09-09 23:56:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:56:41,282 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 132 transitions. [2019-09-09 23:56:41,282 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:56:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 132 transitions. [2019-09-09 23:56:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-09 23:56:41,284 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:56:41,285 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:56:41,285 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:56:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:56:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash 366066161, now seen corresponding path program 1 times [2019-09-09 23:56:41,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:56:41,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:56:41,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,288 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:56:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:56:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:56:41,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:56:41,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:56:41,352 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:56:41,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:56:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:56:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,355 INFO L87 Difference]: Start difference. First operand 91 states and 132 transitions. Second operand 3 states. [2019-09-09 23:56:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:56:41,413 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2019-09-09 23:56:41,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:56:41,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-09-09 23:56:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:56:41,415 INFO L225 Difference]: With dead ends: 101 [2019-09-09 23:56:41,415 INFO L226 Difference]: Without dead ends: 101 [2019-09-09 23:56:41,416 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-09 23:56:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2019-09-09 23:56:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-09 23:56:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 140 transitions. [2019-09-09 23:56:41,424 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 140 transitions. Word has length 24 [2019-09-09 23:56:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:56:41,425 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 140 transitions. [2019-09-09 23:56:41,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:56:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 140 transitions. [2019-09-09 23:56:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-09 23:56:41,427 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:56:41,427 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:56:41,431 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:56:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:56:41,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1690856963, now seen corresponding path program 1 times [2019-09-09 23:56:41,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:56:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:56:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,434 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:56:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:56:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-09 23:56:41,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:56:41,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:56:41,545 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:56:41,546 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:56:41,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:56:41,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,546 INFO L87 Difference]: Start difference. First operand 99 states and 140 transitions. Second operand 3 states. [2019-09-09 23:56:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:56:41,570 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2019-09-09 23:56:41,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:56:41,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-09-09 23:56:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:56:41,572 INFO L225 Difference]: With dead ends: 77 [2019-09-09 23:56:41,572 INFO L226 Difference]: Without dead ends: 77 [2019-09-09 23:56:41,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:56:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-09 23:56:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-09 23:56:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-09 23:56:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2019-09-09 23:56:41,579 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 35 [2019-09-09 23:56:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:56:41,579 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2019-09-09 23:56:41,579 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:56:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2019-09-09 23:56:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-09 23:56:41,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:56:41,581 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:56:41,581 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:56:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:56:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1152804471, now seen corresponding path program 1 times [2019-09-09 23:56:41,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:56:41,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:56:41,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:56:41,583 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:56:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:56:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-09 23:56:41,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:56:41,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 23:56:41,639 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:56:41,640 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 23:56:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 23:56:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-09 23:56:41,640 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand 4 states. [2019-09-09 23:56:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:56:41,690 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-09-09 23:56:41,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-09 23:56:41,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-09-09 23:56:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:56:41,692 INFO L225 Difference]: With dead ends: 56 [2019-09-09 23:56:41,692 INFO L226 Difference]: Without dead ends: 0 [2019-09-09 23:56:41,692 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:56:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-09 23:56:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-09 23:56:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-09 23:56:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-09 23:56:41,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2019-09-09 23:56:41,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:56:41,694 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-09 23:56:41,694 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 23:56:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-09 23:56:41,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-09 23:56:41,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.09 11:56:41 BoogieIcfgContainer [2019-09-09 23:56:41,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-09 23:56:41,702 INFO L168 Benchmark]: Toolchain (without parser) took 2223.21 ms. Allocated memory was 147.8 MB in the beginning and 233.3 MB in the end (delta: 85.5 MB). Free memory was 96.1 MB in the beginning and 174.7 MB in the end (delta: -78.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. [2019-09-09 23:56:41,703 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 114.1 MB in the beginning and 113.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-09 23:56:41,704 INFO L168 Benchmark]: CACSL2BoogieTranslator took 459.25 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 95.7 MB in the beginning and 182.0 MB in the end (delta: -86.3 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2019-09-09 23:56:41,705 INFO L168 Benchmark]: Boogie Preprocessor took 37.94 ms. Allocated memory is still 205.0 MB. Free memory was 182.0 MB in the beginning and 179.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-09-09 23:56:41,705 INFO L168 Benchmark]: RCFGBuilder took 501.14 ms. Allocated memory is still 205.0 MB. Free memory was 179.9 MB in the beginning and 153.5 MB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2019-09-09 23:56:41,706 INFO L168 Benchmark]: TraceAbstraction took 1221.40 ms. Allocated memory was 205.0 MB in the beginning and 233.3 MB in the end (delta: 28.3 MB). Free memory was 153.0 MB in the beginning and 174.7 MB in the end (delta: -21.7 MB). Peak memory consumption was 6.6 MB. Max. memory is 7.1 GB. [2019-09-09 23:56:41,710 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 114.1 MB in the beginning and 113.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 459.25 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 95.7 MB in the beginning and 182.0 MB in the end (delta: -86.3 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.94 ms. Allocated memory is still 205.0 MB. Free memory was 182.0 MB in the beginning and 179.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 501.14 ms. Allocated memory is still 205.0 MB. Free memory was 179.9 MB in the beginning and 153.5 MB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1221.40 ms. Allocated memory was 205.0 MB in the beginning and 233.3 MB in the end (delta: 28.3 MB). Free memory was 153.0 MB in the beginning and 174.7 MB in the end (delta: -21.7 MB). Peak memory consumption was 6.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 343]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 73 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 549 SDtfs, 191 SDslu, 289 SDs, 0 SdLazy, 89 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 6403 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 20/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...